Back when it first made an appearance, the Targa variant of the Porsche 911 had a removable fabric roof panel and a folding rear window to keep it that much more...
Some image from a R33 and R34 With many carbon fiber parts.
http://www.bee-r.com/main/usedcar/ao33r/274-002.jpg
http://www.bee-r.com/main/usedcar/ao33r/274-003.jpg
http://www.bee-r.com/main/usedcar/ao33r/274-013.jpg...